Director Morten Tyldum discusses his latest film The Imitation Game, which is a dramatic portrayal of the life and work of Alan Turing. One of Britain's most extraordinary unsung heroes and the pioneer of modern day computing, Turing led his brilliant team at Britain's top-secret code-breaking centre, Bletchley Park, during the darkest days of World War II. Hosted by Dave Calhoun at the Apple Store, Regent Street in London.